Pipe cutter



Aug. 7, 1928.

L. H. GOELTZ PIPE CUTTER Filed March 4, 1927 til Patented Aug. 7, 1928.

UNITED STATES LOUIS H. GOELTZ, OF MILWAUKEE, WISCONSIN.

PIPE CUTTER.

Application filed March 4, 1927. Serial No. 172,581.

This invention relates toan improvement in pipe cutters and isespecially designed and adapted for use in cutting the various sizes ofiron pipe, which under the present practice are cut by hand by means ofa hammer and chisel. The present method of cutting pipe of thischaracter is laborious, tedious and time consuming and often results inan uneven or non-circular cut.

One of the principal objects of the present invention is to provide apipe cutter des gned for this class of work which greatly facilitatesand speeds up pipe cutting operation while insuring a true and straightor circular cut. A further object is to provide a pipe cutter havingthese advantages and capacities and which is of simple, durable andrugged construction, which is reliable and speedy in operation, which isadjustable for use on various sizes of pipe and which may bemanufactured at a comparatively slight expense from materials and bymeans of facilities ordinarily available.

In carrying out the present invention a support or base is provided andhas a substantially V-shaped seat on each side of which a post isprovided. In the faces of the seat, spring projected pipe supportingrollers are mounted and between these rollers a stationary lower chiselis arranged. One of the posts has a series of pairs of fulcrums thereonwith which an adjustable chisel carrier is selectively engaged. Thechisel carrier is guided in operation by the other post and between theposts it supports a movable chisel. The movable and stationary chiselsare opposed. With this arrangement, with the pipe to be cut supported onthe rollers of the seat and between the chisels, the chisel carrier maybe grasped by one hand and the movable chisel struck with a hammer,whereupon both chisels simultaneously cut into the pipe. The knee of theoperator may be used to rotate the pipe in order to carry out thecutting action around the circumference thereof. It may be desirable toprovide an auxiliary support with a V- shaped seat and rollers, butwithout the chisel at a spaced point in order to keep the pipe with itsaxis at right angles to the plane of cut and thereby insure easyrotation of the pipe and a true and straight cut.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which particularlyFigure 1 is a view in front elevation showing a pipe cutter embodyingthe present invention.

Figure 2 is a view in horizontal section on line 2-2 of Figure 1.

Figure 3 is a View insection on line 33 of Figure 1.

Figure 4 is a fragmentary View in top plan showing the carrier for amovable chisel.

Figure 5 is of the stationary chisel.

Figure 6 is a similar View of the movable chisel, and Figure 7 is a viewshowing the auxiliary support provided for the pipe.

Referring to the drawing, wherein for the sake of illustration is shownone embodiment of the invention, numeral 1 designates generally asupport or base having openings 2 therein whereby it may be secured tothe bench or to any other suitable supporting structure. Integral withthe base 1 is a body portion 3 having its upper end of V-shaped form toprovide a substantially ,V-shaped seat or fioor 4. At the sides of thebody a detailed perspective view portion 3 posts 5 and 6 are providedand may be integral with the body portion 3 and with the base. It is tobe understood that while these parts are shown and described as integralfor the sake of simplicity in illustration, they may be made separateand suitably secured together.

Recesses 7 are provided in the body portion 3, there being at least onesuch recess extending out through each inclined face of the seat 4.Below each recess 7 a guide opening 8 is provided, and a roller carryingframe 9 is mounted in each recess 4 and has a depending guide stud 10slidably fitted in the interlined guide opening 8. The

lllll recess 7 and the roller carrying frames 9 are preferably ofrectangular formso that the recesses 7 and frames 9 coact to constrainthe frames to sliding movement. This guiding action is furthered by thecooperation llli) of the studs 10 and guide openings 8 which llo'bearing arms 11 receiving a pin 12 on which a roller 13 is looselymounted. The pins 12 have friction or driving fits in the openings oftheir bearing arms. Below each stud a compression coil spring 14 isprovided, each spring 14 having its upper end engaging its stud 10 andhaving its lower end engaging the bottom of its opening 8. 1

In between the recess 7 and the inclined faces of the seat 1, the body 3has a recess 15 and at the center of the body an opening 16 is provided,the opening 16 extending from the bottom of the recess 15 down throughthe body 3 and through the base 1. In the recess 15 a fixed chisel orcutter 17 is provided, this chisel or cutter 17 having a cutting edge 18and a fiat base 19 which rests on the bottom of the recess 15. Thechisel 17 also has a dependingstud 20 which may be integral therewithrigidly connected thereto, the stud 20 fitting in the opening 16. Theopening 16 anal stud 20 are non-circular in cross section so as to coactwith the body of the chisel and the recess 15 to prevent the chisel 17from twisting or turning. Movement of the chisel longitudinally in therecess 15 is prevented by the stud 20 and its opening 16.

The post 6 is provided with a series pairs of lugs 21, each pair of lugsproviding a fulcrum. As shown in Figure 3 the members of each pair oflugs are on the opposite sides of the post and are horizontally lined.Each pair of lugs is located at a different vertical height, that is, ata different distance from the seat 4-. The ends of the lugs adjacent toseat 4 are beveled oil" as indicated at 21. A chisel carrier 22 isprovided and comprises a pair of bars 23 having spaced portions 23 andhandle portions 23*, the handle portions flatly engaging each other andbeing held together by bolts and nuts 24. The portions 23 are maintainedin properly spaced relation by means of a bolt and nut assembly 25 and aspacing sleeve 26, the spacing sleeve 26 encircling the bolt of the boltand nut assembly 25 between the spaced portions 23 of the bars 23. Achisel 26 is clamped between the spaced portions 23 of the bars 23 bymeans of bolts 27 and nuts 28. If desired, the chisel 26 may have seriesof grooves or serrations on opposite faces thereof and in theseserrations portions of the bolts 27 fit to positively connect the chisel26 and its carrier 22. The chisel 26 has a cutting edge 30 and an impacthead 31. By providing a plurality of grooves and serrations 29 thechisel 26 may be mounted in any one of plurality of positions oradjustments on its carrier. The ends of the bars 23 opposite the handleportions thereof are formed with notches 32 providing bars or seats tocoact with the fulcrum lugs 21. 1 One wall of each notch 32 may bebeveled off as indicated at 32" to facilitate engagement of the notcheswith any set of fulcrum lugs.

In practice the pipe is placed between the posts 5 and 6 and rests onthe rollers 13 am chisel 17, as illustrated in Figure 1. During thepositioning of the pipe the carrier 22 may be removed so that the pipecan be dropped down between the posts although. of course, the pipe canbe introduced endwise between the posts and below the carrier ifdesired. The carrier has its notches engaged with the proper fulcrum 21for the size of pipe to he cut. Thus. as shown in Figure 1, the carrieris mounted on the uppermost set of lugs 21, but if smaller sizes 01"pipe were to be out then the carrier would be mounted on one of thelower sets of lugs. \Vhen so mounted, the carrier is free to swing aboutthe lugs as a fulcrum. 3y virtue of the coaction of its roller sleeve 26with the post 5, end-wise displacement of the carrier from its fulcrumlugs is prevented. It may be desirable to support the pipe at a pointspaced from the pipe cutter by utilizing an auxiliary support such asshown in Figure 7, and which auxiliary support comprises a base 1, andbody 3, post 5 and 6 and spring supported rollers 13. In other words,the auxiliary support is the same as the cutter with the chisels and themovable chisel carrier omitted. The operator carries out the cutting actby grasping the chisel carrier 22 with one hand and striking the head 31of the chisel 26 with a hammer grasped by the other hand. The pipe maybe rotated by the knee of the operator as rotation is easily impartedthereto due to the roller support. The rollers and the two chisels-tendto prevent axial displacement of the pipe and thus the cut extendsaround in a true circle. The speed with which the cut may be completedis materially enhanced by virtue of the fact that two chisels operate tocut the pipe upon each blow of the hammer. Different sizes of pipe mayhe cut by merely shifting the carrier 22 to different fulcrums. Therollers 13 are automatically projected to engage the various sizes ofthe pipe.

The invention claimed is:

1. A pipe cutter comprising cooperable chisels and means for centeringthe pipe between the chisels, including a pair of spring projectedrollers.

2. A pipe cutter comprising cooperable chisels and means for centeringthe pipe between the chisels, including a pair of spring projectedrollers, said rollers being angled with respect to one of the chisels.

3. A pipe cutter comprising a base, a fixed chisel projecting upwardlytherefrom at the center of the base, means for centering the pipe oversaid chisel, a pair of posts extending upwardly from the base of thebody,

III)

a, chisel on one of said posts, means on the chisel carrier coactingwith the other postfor constraining the chisel carrier to propermovements, and a movable chisel connected to said chisel carrier.

5. A pipe cutter comprising a base, a fixed chisel projecting upwardlyfrom the base, means for centering the pipe over said fixed chisel,posts extending up from the body and base, a movable chisel carrier,means for adjustably mounting the movable chisel on one of said posts,means on the chisel carrier coacting with the other post forconstraining the chisel carrier to proper movements, a movable chisel,and means for adjustably mounting the movable chisel on the chiselcarrier.

6. A pipe cutter comprising a base, a fixed chisel projecting above thebase, means for centering the pipe on said base, posts extending abovethe base and seat, a chisel carrier having spaced portions embracingsaid posts, means for adjustably connecting one end of the carrier toone of the posts, means extending between the spaced portions andcooperating with the other post for preventing endwise displacement ofthe carrier, and a movable chisel connected to said carrier.

7. A pipe cutter comprising a base, a fixed chisel projecting above thebase, means for centering the pipe on said base, posts extending abovethe base and seat, a chisel carrier having spaced portions embracingsaid posts, means for adjustably connecting one end of the carrier toone of the posts, and a movable chisel connected to said carrier.

8. A pipe cutter comprising a base, a fixed chisel projecting upwardlyfrom the base,

rollers engageable with the pipe for centering the same over the fixedchisel, spring means for projecting the rollers above the chisel, postsconnected to the base and extending above the same, a chisel carrieradjustably mounted on said posts, and a movable chisel connected to saidchisel carrier.

9. A device for cutting pipe, including cooperable chisels and meansforsupporting the pipe between the chisels and for permitting rotationof the same and comprising a number of seats having inclined faces, androllers projecting above the inclined faces.

10. A pipe cutter having a stationary portion of the pipe, yieldablemeans for sup porting the pipe centered over the stationary chisel, amovable chisel carrier, means carried by the base and coacting with thechisel carrier for supporting it for movement toward and away from thebase in the plane of the stationary chisel, and a movable chisel mountedon the chisel carrier and having a projecting portion adapted to bestruck by a hammer.

12. A pipe cutter comprising a base, a stationary chisel projectingupwardly from the base and engageable with the under portion of thepipe, posts projecting upwardly from the base in the opposite sides ofthe stationary chisel, a movable chisel carrier, cooperating meansbetween the chisel carrier and the posts for removably and adjustablyinterconnecting the chisel carrier to the posts, said chisel carrierbeing movable toward and' away from the stationary chisel in anyadjustment, and a movable chisel mounted on the chisel carrier.

In witness whereof, I hereto aifix my signature.

LOUIS. n. GOELTZ.

